For a comprehensive review of the genus (including detailed accounts for each species) see Csorba et al. (2003). Includes Rhinomegalophus; see Thonglongyai (1973). For partial phylogenies see Qumsiyeh et al. (1988b), Bogdanowicz and Owen (1992), and Maree and Grant (1997); also see Guillén-Servent (2001). Species groups follow Csorba et al. (2003)